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/** \file     TDecBinCoderCABAC.h
    \brief    binary entropy decoder of CABAC
*/

#ifndef __TDEC_BIN_CODER_CABAC__
#define __TDEC_BIN_CODER_CABAC__

#include "TLibCommon/TComCABACTables.h"
#include "TDecBinCoder.h"

//! \ingroup TLibDecoder
//! \{

class TDecBinCABAC : public TDecBinIf
{
public:
  TDecBinCABAC ();
  virtual ~TDecBinCABAC();
  
  Void  init              ( TComInputBitstream* pcTComBitstream );
  Void  uninit            ();
  
  Void  start             ();
  Void  finish            ();
#if OL_FLUSH
  Void  flush             ();
#endif
  
  Void  decodeBin         ( UInt& ruiBin, ContextModel& rcCtxModel );
  Void  decodeBinEP       ( UInt& ruiBin                           );
  Void  decodeBinsEP      ( UInt& ruiBin, Int numBins              );
  Void  decodeBinTrm      ( UInt& ruiBin                           );
  
  Void  resetBac          ();
  Void  decodePCMAlignBits();
  Void  xReadPCMCode      (UInt uiLength, UInt& ruiCode);
  
  Void  copyState         ( TDecBinIf* pcTDecBinIf );
  TDecBinCABAC* getTDecBinCABAC()  { return this; }
#if !OL_FLUSH_ALIGN
  Int   getBitsReadAhead() { return -m_bitsNeeded; }
#endif

private:
  TComInputBitstream* m_pcTComBitstream;
  UInt                m_uiRange;
  UInt                m_uiValue;
#if OL_FLUSH && !OL_FLUSH_ALIGN
  UInt                m_uiLastByte;
#endif
  Int                 m_bitsNeeded;
};

//! \}

#endif

